CALEFFI 578 Serie Documentation Technique page 29

Simple, Reliable and Accurate
CLA-VAL SERIES 100 Main Function
The CLA-VAL 100-01
hydraulically operated, diaphragm actuated, globe or
angle pattern valve.
It consists of three major components: body,
diaphragm assembly and cover. The diaphragm
assembly is the only moving part, guided top and
bottom by a precision machined stem. The disc
retainer and rubber disc form a drip-tight seal with
the renewable seat when pressure is applied above
the diaphragm (cover chamber).
The CLA-VAL 100-01 is the basic valve used in
nearly in all CLA-VAL Automatic Control Valves.
There are 3 HYTROL body types:
NGE: New Globe Execution
GE: Globe Execution
AE: Angle Execution
CLA-VAL 100-01 Principle of Operation
On/Off Control
Full Open Operation:
When pressure in the cover chamber
is relieved to a lower pressure or to
atmosphere, the pressure inlet opens
the valve.
HYTROL Valve is a
On/Off Control
Tight Closing Operation:
When pressure from the inlet pressure
is applied to the cover chamber, the
valve closes drip-tight.
Cover
Diaphragm
Seat
Body
Diaphragm
assembly
29
Serie 578
Main Valve HYTROL
Disc retain &
Rubber disc
Stem
CLA-VAL Controls
Modulating Control:
The valve is pressure operating
balanced. The CLA-VAL "Modulating"
Controls will allow the valve to
automatically compensate
pressure changes.
for